If we have to relax the data for this sig, return our copy of it. */
static blob *
-pdkim_update_ctx_bodyhash(pdkim_bodyhash * b, blob * orig_data, blob * relaxed_data)
+pdkim_update_ctx_bodyhash(pdkim_bodyhash * b, const blob const * orig_data, blob * relaxed_data)
{
-blob * canon_data = orig_data;
+const blob const * canon_data = orig_data;
+size_t left;
+
/* Defaults to simple canon (no further treatment necessary) */
if (b->canon_method == PDKIM_CANON_RELAXED)
}
/* Make sure we don't exceed the to-be-signed body length */
+left = canon_data->len;
if ( b->bodylength >= 0
- && b->signed_body_bytes + (unsigned long)canon_data->len > b->bodylength
+ && b->signed_body_bytes + left > b->bodylength
)
- canon_data->len = b->bodylength - b->signed_body_bytes;
+ left = b->bodylength - b->signed_body_bytes;
-if (canon_data->len > 0)
+if (left > 0)
{
- exim_sha_update(&b->body_hash_ctx, CUS canon_data->data, canon_data->len);
- b->signed_body_bytes += canon_data->len;
- DEBUG(D_acl) pdkim_quoteprint(canon_data->data, canon_data->len);
+ exim_sha_update(&b->body_hash_ctx, CUS canon_data->data, left);
+ b->signed_body_bytes += left;
+ DEBUG(D_acl) pdkim_quoteprint(canon_data->data, left);
}
return relaxed_data;
/* VERIFICATION --------------------------------------------------------- */
/* Be careful that the header sig included a bodyash */
- if ( sig->bodyhash.data
+ if (sig->bodyhash.data && sig->bodyhash.len == b->bh.len
&& memcmp(b->bh.data, sig->bodyhash.data, b->bh.len) == 0)
{
DEBUG(D_acl) debug_printf("DKIM [%s] Body hash compared OK\n", sig->domain);